Question

Question #8892a

Answer 1

The passenger's velocity is indeterminate from the information given (no direction).
The passenger's speed relative to the ground is `25.0 (km)/h`

Explanation:

The train is moving at a speed relative to the ground `W = 30.0(km)/h`

The passenger is moving at a speed relative to the train `E = 5.0(km)/h`

To calculate the relative speed of the passenger to the ground, `PGS` we would add his speed to the speed of the train relative to the ground.

`PGS = W + E`

But here the direction of travel for the passenger is opposite that of the train, so his speed becomes a negative value.

`PGS = W - E`

`PGS = 30.0 - 5.0 = 25.0(km)/h`

If the train were to be travelling north at this moment, the passenger would be travelling at a `velocity 25.0(km)/h` north relative to the ground.